Acoustic Noise Control During Auditory FMRI Using a DSP System - First Initial in vivo Results

Daniel Gllmar¹, Markus Hdrich¹, ², Jrgen R. Reichenbach¹

We implemented a template driven active noise cancellation algorithm on a DSP system in order to attenuate the acoustic noise which accompanies especially fmri acquisitions. Employing acoustic stimuli, we found that stopping filter adaptation during stimulus presentation yields to much better activation in terms of HRF amplitude in the auditory cortex, whereas without noise control at all, no activation was detected in the auditory cortex, although the stimuli were detected.